new standards of weights and measures. 1 7 



No. 1 . contains 1 wire = ,005 gr. 



2. . . 1 wire =: ,020 gr. 



3. . . 3 wires = ,050 + ,005 + ,005 gr. 



4. . . 2 wires = ,002 + ,002 gr. 



5. . . 2 wires = ,004 + ,002 gr. 



In order to employ the whole of the preceding comparisons 

 in deducing a final result, it will be necessary to add to each 

 error given in the Tables the sum of the weights which were 

 enclosed after the determination of such error. 



Troy Pound No, 1. 



The mean of six comparisons gave for the 



error of No. 1 . 

 The mean of six other comparisons 



Troy Pound No. 2. 



The mean of three comparisons gave for 



the error of No. 2. — ,037 + ,02 = 

 The mean of six other comparisons 

 of six other comparisons 



Troy Pound No. 3. 

 The mean of six comparisons gave 



,0043 + ,005 + ,005 =: - 



The mean of four other comparisons 

 gave — ,0065 + ,005 + ,005 = - 



The mean of four other comparisons 

 gave — ,0074 + ,005 - - ' = - 



The mean of six other comparisons - - 



MDCCCXXVI. D 



Grains. 



+,001 



- ,000 



— ,0170 

 + ,0029 

 + ,0018 



+ ,0057 

 + ,0035 



^ ,0024 

 + ,0005 



